A new study from Cornell University shows Americans are getting too fat to serve in the military.

According to the study, military applicants who are rejected are turned away more for being obese than anything else. Twenty-three percent of applicants were rejected because they were obese. Meanwhile, 12 percent of applicants were rejected for the second highest reason, marijuana use.

The findings were published in a paper titled “Unfit for Service: The Implications of Rising Obesity for U.S. Military Recruitment,” by the National Bureau of Economic Research in September.

The author of the study, John Cawley, noted to the Cornell Daily Sun the military’s weight requirements were originally put in place to weed out those who were malnourished but now serve the opposite purpose.

Additionally, the Cornell Daily Sun reports: “As a result of the growing trend of obesity among Americans, there has been an increased use of machines in the military and privatization of certain services — like security — in order to provide less labor intensive work for potential recruits, Cawley said.”